Anwiki CMS

I just got the error message "Unable to render content. You may need to edit and update this content." It is clear that I made a mistake in the template somewhere - but there is no way to tell what this mistake is. The original error was neither written to the server's error log nor Anwiki's log which makes debugging this problem rather hard. I think this change to action_view.php is necessary:

catch (AnwException $e)
{
+ AnwDebug::reportError($e);
$oOutputHtml = new AnwOutputHtml($this->getoPage());
$oOutputHtml->setBody( self::g_("err_rendercontent"), false );
}